sea: fix problem with LscDrivable.read_value

frappy_psi/sea.py

@@ -892,13 +892,9 @@ class LscDrivable(SeaDrivable):
 
     def read_value(self):
         if self.io.syncio:
-            try:
-                if self.dblctrl and not self._read_value_error:
-                    reply = self.io.query('hval tt', True)
-                else:
-                    reply = self.io.query(f'hval tt/{self.rel_paths[1]}', True)
-            except Exception as e:
-                print(e)
-            # an updateEvent will be handled before above returns
+            if self.dblctrl and not self._read_value_error:
+                reply = self.io.query('hval tt', True)
+            else:
+                reply = self.io.query(f'hval tt/{self._sensor_path}', True)
             return float(reply)
         return self.value